PersistentVolumeClaim (PVC) definition in Kubernetes - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is a PersistentVolumeClaim (PVC) in Kubernetes?

A PersistentVolumeClaim (PVC) is a request for storage by a user. It allows pods to claim storage resources without knowing the details of the underlying storage.

beginner

Which key fields are required in a basic PVC YAML definition?

apiVersion, kind, metadata (name), and spec (accessModes, resources.requests.storage).

intermediate

What does the accessModes field in a PVC specify?

It specifies how the volume can be mounted. Common values are ReadWriteOnce, ReadOnlyMany, and ReadWriteMany.

intermediate

How does a PVC relate to a PersistentVolume (PV)?

A PVC requests storage, and Kubernetes binds it to a matching PersistentVolume (PV) that provides the actual storage.

intermediate

What happens if no matching PersistentVolume is available for a PVC?

The PVC stays in a pending state until a suitable PersistentVolume is available or dynamically provisioned.

Which field in a PVC YAML defines the amount of storage requested?

A spec.resources.requests.storage

B metadata.name

C spec.accessModes

D apiVersion

The storage size requested is specified under spec.resources.requests.storage.

What does the access mode ReadWriteOnce mean in a PVC?

A The volume can be mounted as read-only by many nodes

B The volume can be mounted as read-write by a single node

C The volume can be mounted as read-write by many nodes

D The volume is read-only and cannot be mounted

ReadWriteOnce means the volume can be mounted as read-write by only one node at a time.

If a PVC is created but no matching PV exists, what is the PVC status?

A Available

B Bound

C Pending

D Released

The PVC remains in Pending state until a matching PV is found or provisioned.

Which Kubernetes object does a PVC bind to?

A Pod

B ConfigMap

C Namespace

D PersistentVolume (PV)

A PVC binds to a PersistentVolume (PV) that provides the actual storage.

What is the kind value in a PVC YAML file?

A PersistentVolumeClaim

B PersistentVolume

C StorageClass

D Pod

The kind field for a PVC YAML is PersistentVolumeClaim.

Explain the purpose of a PersistentVolumeClaim in Kubernetes and how it interacts with PersistentVolumes.

Think of PVC as a storage order and PV as the storage supply.

Describe the key fields in a PersistentVolumeClaim YAML and their roles.

Focus on the YAML structure and what each part means.